private static void test005()
//****************************************************************************80
//
// Purpose:
//
// TEST005 tests TETRAHEDRON_BARYCENTRIC.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 01 August 2009
//
// Author:
//
// John Burkardt
//
{
int test1;
const int test1_num = 3;
const int test2_num = 5;
int seed = 123456789;
Console.WriteLine("");
Console.WriteLine("TEST005");
Console.WriteLine(" TETRAHEDRON_BARYCENTRIC computes the barycentric");
Console.WriteLine(" coordinates of a point.");
//
// Choose a random tetrahedron.
//
for (test1 = 1; test1 <= test1_num; test1++)
{
double[] tet_xyz = UniformRNG.r8mat_uniform_01_new(3, 4, ref seed);
typeMethods.r8mat_transpose_print(3, 4, tet_xyz, " Random tetrahedron:");
//
// Choose barycentric coordinates C1 at random.
//
// Define a point P.
//
// Have TETRAHEDRON_BARYCENTRIC compute C2, the barycentric coordinates of P.
//
int test2;
for (test2 = 1; test2 <= test2_num; test2++)
{
double[] c1 = UniformRNG.r8vec_uniform_01_new(4, ref seed);
double c1_sum = typeMethods.r8vec_sum(4, c1);
int i;
for (i = 0; i < 4; i++)
{
c1[i] /= c1_sum;
}
double[] p = typeMethods.r8mat_mv_new(3, 4, tet_xyz, c1);
double[] c2 = Tetrahedron.tetrahedron_barycentric(tet_xyz, p);
Console.WriteLine("");
string cout = " C1 = ";
for (i = 0; i < 4; i++)
{
cout += " " + c1[i].ToString("0.######").PadLeft(14);
}
Console.WriteLine(cout);
cout = " C2 = ";
for (i = 0; i < 4; i++)
{
cout += " " + c2[i].ToString("0.######").PadLeft(14);
}
Console.WriteLine(cout);
}
}
}
private static void test007()
//****************************************************************************80
//
// Purpose:
//
// TEST007 tests TET_MESH_SEARCH_NAIVE.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 19 August 2009
//
// Author:
//
// John Burkardt
//
{
int face = 0;
int node_num = 0;
double[] p = new double[3];
int step_num = 0;
int test;
const int test_num = 5;
int tet_num = 0;
const int tet_order = 4;
double[] tet_xyz = new double[3 * 4];
int seed = 123456789;
Console.WriteLine("");
Console.WriteLine("TEST007");
Console.WriteLine(" TET_MESH_SEARCH_NAIVE uses a naive algorithm");
Console.WriteLine(" to search a tetrahedral mesh for the tetrahedron");
Console.WriteLine(" containing a point.");
//
// Set up the example tetrahedron mesh.
//
TetMesh.tet_mesh_order4_example_size(ref node_num, ref tet_num);
Console.WriteLine("");
Console.WriteLine(" This mesh has tetrahedron order " + tet_order + "");
Console.WriteLine(" The number of tetrahedrons is " + tet_num + "");
double[] node_xyz = new double[3 * node_num];
int[] tet_node = new int[tet_order * tet_num];
TetMesh.tet_mesh_order4_example_set(node_num, tet_num, ref node_xyz, ref tet_node);
//
// The TET_NEIGHBOR array is needed for the Delaunay search.
//
int[] tet_neighbor = TetMesh.tet_mesh_neighbor_tets(tet_order, tet_num, tet_node);
for (test = 1; test <= test_num; test++)
{
//
// Choose a tetrahedron at random.
//
int tet1 = UniformRNG.i4_uniform_ab(0, tet_num - 1, ref seed);
Console.WriteLine("");
Console.WriteLine(" Point was chosen from tetrahedron " + tet1.ToString(CultureInfo.InvariantCulture).PadLeft(8) + "");
int j;
for (j = 0; j < 4; j++)
{
int k = tet_node[j + tet1 * 4];
int i;
for (i = 0; i < 3; i++)
{
tet_xyz[i + j * 3] = node_xyz[i + k * 3];
}
}
//
// Choose a point in the tetrahedron at random.
//
Tetrahedron.tetrahedron_sample(tet_xyz, 1, ref seed, ref p);
//
// Naive search.
//
int tet2 = TetMesh.tet_mesh_search_naive(node_num, node_xyz, tet_order, tet_num,
tet_node, p, ref step_num);
Console.WriteLine(" Naive search ended in tetrahedron " + tet2.ToString(CultureInfo.InvariantCulture).PadLeft(8)
+ ", number of steps = " + step_num + "");
//
// Delaunay search.
//
int tet3 = TetMesh.tet_mesh_search_delaunay(node_num, node_xyz, tet_order,
tet_num, tet_node, tet_neighbor, p, ref face, ref step_num);
Console.WriteLine(" Delaunay search ended in tetrahedron " + tet3.ToString(CultureInfo.InvariantCulture).PadLeft(8)
+ ", number of steps = " + step_num + "");
}
}
private static void test002()
//****************************************************************************80
//
// Purpose:
//
// TEST002 tests TETRAHEDRON_ORDER4_PHYSICAL_TO_REFERENCE,
// TETRAHEDRON_ORDER4_REFERENCE_TO_PHYSICAL.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 08 December 2006
//
// Author:
//
// John Burkardt
//
{
const int N = 10;
int j;
double[] phy = new double[3 * N];
double[] ref_ = new double[3 * N];
double[] ref2 = new double[3 * N];
double[] t =
{
5.0, 0.0, 0.0,
8.0, 0.0, 0.0,
5.0, 2.0, 0.0,
6.0, 1.0, 2.0
};
int seed = 123456789;
Console.WriteLine("");
Console.WriteLine("TEST002");
Console.WriteLine(" For an order 4 tetrahedron,");
Console.WriteLine(" TETRAHEDRON_ORDER4_PHYSICAL_TO_REFERENCE");
Console.WriteLine(" maps a physical point to a reference point.");
Console.WriteLine(" TETRAHEDRON_ORDER4_REFERENCE_TO_PHYSICAL ");
Console.WriteLine(" maps a reference point to a physical point.");
Console.WriteLine("");
Console.WriteLine(" ( R, S, T ) ==> ( X, Y, Z ) ==> ( R2, S2, T2 )");
Console.WriteLine("");
Tetrahedron.tetrahedron_reference_sample(N, ref seed, ref ref_);
Tetrahedron.tetrahedron_order4_reference_to_physical(t, N, ref_, ref phy);
Tetrahedron.tetrahedron_order4_physical_to_reference(t, N, phy, ref ref2);
for (j = 0; j < N; j++)
{
Console.WriteLine(" " + ref_[0 + j * 3].ToString("0.####").PadLeft(8)
+ " " + ref_[1 + j * 3].ToString("0.####").PadLeft(8)
+ " " + ref_[2 + j * 3].ToString("0.####").PadLeft(8)
+ " "
+ " " + phy[0 + j * 3].ToString("0.####").PadLeft(8)
+ " " + phy[1 + j * 3].ToString("0.####").PadLeft(8)
+ " " + phy[2 + j * 3].ToString("0.####").PadLeft(8)
+ " "
+ " " + ref2[0 + j * 3].ToString("0.####").PadLeft(8)
+ " " + ref2[1 + j * 3].ToString("0.####").PadLeft(8)
+ " " + ref2[2 + j * 3].ToString("0.####").PadLeft(8) + "");
}
}
